Running pessimize after fresh install, undefined method `[]' for nil:NilClass

[joemsak]

Hello

I'm unable to use the gem suddenly. Please let me know if I am missing something, or what I should inspect? Thanks!

[DEPRECATION] The trollop gem has been renamed to optimist and will no longer be supported. Please switch to optimist as soon as possible.
Backing up Gemfile and Gemfile.lock
 + cp Gemfile Gemfile.backup
 + cp Gemfile.lock Gemfile.lock.backup

Traceback (most recent call last):
        13: from /Users/joemsak/.asdf/installs/ruby/2.6.5/bin/pessimize:23:in `<main>'
        12: from /Users/joemsak/.asdf/installs/ruby/2.6.5/bin/pessimize:23:in `load'
        11: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/bin/pessimize:5:in `<top (required)>'
        10: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/shell.rb:15:in `run'
         9: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/pessimizer.rb:14:in `run'
         8: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/pessimizer.rb:28:in `collect_gems_and_versions'
         7: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/pessimizer.rb:28:in `new'
         6: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gemfile.rb:13:in `initialize'
         5: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gemfile.rb:27:in `parse_gems_from_tokens!'
         4: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gemfile.rb:27:in `loop'
         3: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gemfile.rb:37:in `block in parse_gems_from_tokens!'
         2: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gemfile.rb:37:in `new'
         1: from /Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gem.rb:9:in `initialize'
/Users/joemsak/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/pessimize-0.4.0/lib/pessimize/gem.rb:52:in `parse_version': undefined method `[]' for nil:NilClass (NoMethodError)
kadenzeweb develop % ruby -v
ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin19]```